Glow Calender

So I usually get my period at the end of the month however last month I got it at the very beginning due to a hormone change in my body. I stopped taking birth control pills so I could get on the depo. I'm injected with the depo now and have been for almost seven days. Anyway now my glow Calender is messed up and it's saying I should be getting my period right about now. I know im not pregnant because I've had protected sex with no condom failures... how do I fix my calender?

thanks guys.